Finding the Third Proportional to 12,782,054 and 17,978,812

Step by Step Solution

1. Step 1: Write the proportion equation
   12,782,054 : 17,978,812 = 17,978,812 : x
2. Step 2: Convert to fraction form
   12,782,054/17,978,812 = 17,978,812/x
3. Step 3: Cross multiply
   12,782,054x = 17,978,812 × 17,978,812
4. Step 4: Simplify right side
   12,782,054x = 323,237,680,931,344
5. Step 5: Solve for x
   x = 323,237,680,931,344/12,782,054
6. Step 6: Final answer
   x = 25,288,398.95